Why This Battery Felt Weak?

This battery looks fine at 2A… but completely fails at 10A. Here’s what’s really happening. In this video, I test a battery pack under different load conditions to see how it actually performs. At low current (around 2A), everything looks normal. Voltage is stable, and the battery seems perfectly fine. But when I increase the load to 10A— 👉 things change very quickly. 🔧 What I tested: Low load (2A) performance High load (10A) stress test Voltage drop under load Cell behavior inside the pack 📊 What I found: Stable performance at low current Severe voltage drop at higher load One weak cell/group affecting the entire pack This is why some batteries feel “fine” until you actually use them. If you’re building or using battery packs, this is something you need to understand. I test batteries like this all the time— subscribe if you want to see what actually works. --- Subscribe for more real tests: 👉 https://www.youtube.com/@powertruth1991 --- #battery #18650 #lithiumion #diy #electronics